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Finding the Fourth Proportional to 154,290.93, 212,941.17 and 86,311.68

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Solution

The fourth proportional to 154,290.93, 212,941.17 and 86,311.68 is: 119,121.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,290.93 : 212,941.17 = 86,311.68 : x
  2. Step 2: Convert to fraction form
    154,290.93/212,941.17 = 86,311.68/x
  3. Step 3: Cross multiply
    154,290.93x = 212,941.17 × 86,311.68
  4. Step 4: Simplify right side
    154,290.93x = 18,379,310,123.87
  5. Step 5: Solve for x
    x = 18,379,310,123.87/154,290.93
  6. Step 6: Final answer
    x = 119,121.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.